Imaging array with improved dynamic range
US7825975B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Feb 25, 2008 |
| Grant date | Nov 2, 2010 |
| Priority date | — |
| Expiry date | Mar 16, 2029 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image sensor and a method for using the same are disclosed. The image sensor includes an array of pixel sensors, a signal digitizing circuit, and a digitizing controller. The array of pixel sensors includes a plurality of pixel sensors. Each pixel sensor includes a photodetector, a charge conversion circuit, and a gate transistor. The charge conversion circuit generates a voltage signal that is related to a charge on the photodiode, and the gate transistor couples the voltage signal to a bit line in response to a first signal. The signal digitizing circuit converts the voltage signal to a plurality of output digital values. Each output digital value has a different level of digitization noise. One of the output digital values is selected for output in response to an output selection signal that is generated by the digitizing controller.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.